Surface-indicator.



, citizen of the United States, and resident of rotation axis o the, work.

on the line of its contact with the device.

. ject the simplificationof the 1device, gas, a.

Efa'e's' 'differently disposed relatvely Ito* the `4-finafter .appear :and -fpa-rticularly be fpointed.

in which-"- I UNITED STATES PATENT OFFICE.

FREDERICK BRINK, oF HARTFORD, CONNECTICUT. I

simirncnnmrca'ron.

To all whom it may concern:

Be it known that I, FREDERICK BRINK, a

Hartford, in the county of Hartford and State of Connecticut, have invented -certaiii new and useful Improvements in Surface- Indicators, of which'the following is a full, clear, and exact specification.

This invention relates vto surface indicators' and more especially to that' class thereof which are employed t'o determine the truerunning condition of a piece of work in a lathe, grinding machine, or other machine tool, in order to enable the workman to center the same properly, or -to determinel its eccentricity or'deviation from a true-circle :My invention has for -one of its 'objects the provision of an A.instrument of this class which may be secured in a tool-post of a lathe, and the workinoparts of..which arenormally protected by tbeing contained within the interior of the stem of the device.

.luy invention has, furthermore, for its 013-'l ject the provision of improved means for transferring the movement of the contact point of the device, u,- the indexing member thereof in a largely-increased rate, so that very small deflections from an .absolutely true surface will be magnified suiciently and to such an extent that the operator may read thenilplainly. My invention has, furthermore, for its obwhole, and to adapt the same for use on sur- A'Further objects lof the invention out in the claim.

My invention has'been clearly [illustrated: in the'- accompanyingv drawings, -.-ii1 iivliieh similar characters denote similar parts, and

F igurel represents`A a perspective view-of an indicator embodying my invention. Fig. 2 shows a, to -view thereof, the cover-plate at. the rear o the tool being removed. Fig.

In the drawings, l0 denotes a holder or shank adapted to be secured in the tool post of a lathe, and for receiving the several parts of the indicating mechanism. Secured to the frontend of the shank 10, is a sleeve 11, in screw threaded engagement preferabl Specication of Letters Yatent.`

Application lcdJuly 2, 1907. Serial .No1-381,946.

otherprpjeetion 21V of a, spin "isjoiirnaldoi'i screw 28, and also ing vplate,2 9, seqirewd to the bar whereby the spring 34: en agin V2 shank and having a cylindrical with sai Patented July 20, 1909.

which may be clamped thereon in any desired osition, vby means of a clamping screw 14. ivoted at 15T on the bracket 13, is an angle lever`16, one arm 17. of which extends ytowardthe center of the hub 12, while the other arm 18 is disposed substantially at a. rightangle relatively -to the arm 17 and carlries -at itsjfree end a feeler-member shown lierei may e clam ed -wi as Aa. knob l9'tl ie shank -20 ofxwhich liin a Vrecess 21 provided thereforint ie arm 1 8. 'The knob 19 constitutes -that'part of the mechanism which -comes'jin contact with the work -to be tested,

l'and'may be readily changed to suit the particular vrequirements or replaced when worn.

' -I'nas'rr'i'uch 'as the bracket is'mounted for rotational adjustment on the'hub 12,' it is evi# dent that varioslyidispo'sed-surfaces may be --tested-withoutchanfingther-position of the lholder 1'0 in'"-Ethe to'o-post.- he arm 17 enga es the 'forward-end of a 'longitudinally- -Sshiftable rod 2 2 Testing in thefcentral bore off the sleeve 'lland constituting the primary member of the indxiiigfdevice.' Atits `rear end the rod 22 is in engagement with an ear 123 formed on the hub 24 of a. lever 25 which is fulcrumed on a. stud 25 fixed in the shank or bar 10, which latter is recessedzas at 26 to receive the several .operating parts. The front end of the lever 25 en ga .za pin or 52S 27 which to opening 4lie, recess 26 is closed and wliich'is s'u cientlystrong-.to resist the pressure o the toolostscrew whereby the in'- oft i aduation-marks which are t'o be read by le opera-tor in conjunction with the outer face of a. Sidefplfate 32 whereby the side o ening of .the recess 26 1s closed, said plate liaving a vslot 33-to permit the arm 3 0 to swing outwardly when the rod 22 is moved rearwardly by the surface of flic work.

Means .are provided for normally retracting the index arm 30 into the recess 26, these means consistin preferably of .a blade a lug 35 on the spindle (see Fig. 2 an Vthe organization is such that when the index arm is in its normal or retracted position, the end `of the blade hub portion 12 for receiving a bracket 13,

31 will be substantially vflush with the surface of the late 32, so that no part of the delicate indlxing mechanism projects beyond the lines of the bar 10`. Furthermore, by virtue of the rod 22 resting against the ear 23 on the rotatable hub 24, it 1s evident that an excess of movement of said rod will result in disengaging the latter from said ear, inasmuch as the rod moves on practically a straight line While the ear revolves, so that the rod-end will ultimately be pushed from the ear and thus release itself from the indexing device, and no damage can result. A similar action takes place between the end of the lever 25 and the pin 27.

In order to maintain the end of rod 22 in proper vertical position relative to the ear 23, the latter is provided with a lip 23,

upon which said rod-end rests, and whichat the same time prevents the rod from turnin overinj--the bar 10.

rom th foregoin description it will be understood, that the lade spring 34 serves to swtng Wall 26 of the recess '26, this action resulting at the same time in swinging the lever 25 until its abutment face 40 contacts with said side wall 26', and the Several parts are thus heldagainst free play. 1

In order to prevent the'rod 22 from free movement, I provide a spring -11 seated in a recess 42 of the bar 10, and resting against a collar 43 which is secured to the rod 22 and serves als as a meansfor limiting-the outward movement thereof.

the index-arm 30 toward the side.y

'gagement with said rod.

therein that the saline mayco'ltl'fOrm t0 the ,'eCQId 0f the 03.5.6. linitlf.

Signed andfsealed this 3rd day of-lAugust,

The lever-system' above described has for its particular object to magnify the movement of the rod 22 to such an extent that in practice deflections of the work-surface can be readily discovered, even if they are not more than one-ten thousandth of an inch, and there are no arts permanently disposed on the outside ofp the bar 10.

The instrument is shown in action, in Figs. 2 and 3, pressure being exerted by the work in the direction of arrow a Fig. 3), and any variation in the work-sur ace will 5 result in-a vibration of the index-blade 31.

fVlien it is -desired to 'use the instrument m a dlrect manner, or in-otlier Words: to let the end of the rod 22 'rest against the work without the intervention of the' angle lever 16, the latter may be removed with the bracket 13, or it may be simply swungy backy,

Ward around its pivot pin 15'.

- I claim: r The combination, with a member 30 carried thereby, a rod'22 shiftable in said bar, and means for transferring movement of said rod to the index member, of a cylindrical sleeve 12 on the bar and supporting said rod, a bracket adjustably and rotatably mounted on said sleeve, 'means for holding said bracket on said sleeve and'angle bar l0, an index` :l

lever fulcrumed on said bracket and in' en- Q;-

FREDERICK BRINK. Witnesses: f

A BNER W. BARTON, Y CHAs. F. SCHMELZ.` I

i Surface-Indicators," errore appear in theprinted' specification(requiring correction, I'

n is hrebyii'ed han letters Patent No. 928,492, graptdqqlyfiss, upon the applic'atiof'bf Frederick B1-ink, of Hartford,Connecticut, for an im'pirpyelment in as follows;;the^jc1aim,'the reference-numerals.1,`v llqzvvlgrffglbuld be? stricken'out; fand that'the said Letters Patent should be read Awiththese'lco'rr 31 will be substantially vflush with the surface of the late 32, so that no part of the delicate indlxing mechanism projects beyond the lines of the bar 10`. Furthermore, by virtue of the rod 22 resting against the ear 23 on the rotatable hub 24, it 1s evident that an excess of movement of said rod will result in disengaging the latter from said ear, inasmuch as the rod moves on practically a straight line While the ear revolves, so that the rod-end will ultimately be pushed from the ear and thus release itself from the indexing device, and no damage can result. A similar action takes place between the end of the lever 25 and the pin 27.

In order to maintain the end of rod 22 in proper vertical position relative to the ear 23, the latter is provided with a lip 23,

upon which said rod-end rests, and whichat the same time prevents the rod from turnin overinj--the bar 10.

rom th foregoin description it will be understood, that the lade spring 34 serves to swtng Wall 26 of the recess '26, this action resulting at the same time in swinging the lever 25 until its abutment face 40 contacts with said side wall 26', and the Several parts are thus heldagainst free play. 1

In order to prevent the'rod 22 from free movement, I provide a spring -11 seated in a recess 42 of the bar 10, and resting against a collar 43 which is secured to the rod 22 and serves als as a meansfor limiting-the outward movement thereof.

the index-arm 30 toward the side.y

'gagement with said rod.

therein that the saline mayco'ltl'fOrm t0 the ,'eCQId 0f the 03.5.6. linitlf.

Signed andfsealed this 3rd day of-lAugust,

The lever-system' above described has for its particular object to magnify the movement of the rod 22 to such an extent that in practice deflections of the work-surface can be readily discovered, even if they are not more than one-ten thousandth of an inch, and there are no arts permanently disposed on the outside ofp the bar 10.

The instrument is shown in action, in Figs. 2 and 3, pressure being exerted by the work in the direction of arrow a Fig. 3), and any variation in the work-sur ace will 5 result in-a vibration of the index-blade 31.

fVlien it is -desired to 'use the instrument m a dlrect manner, or in-otlier Words: to let the end of the rod 22 'rest against the work without the intervention of the' angle lever 16, the latter may be removed with the bracket 13, or it may be simply swungy backy,

Ward around its pivot pin 15'.

- I claim: r The combination, with a member 30 carried thereby, a rod'22 shiftable in said bar, and means for transferring movement of said rod to the index member, of a cylindrical sleeve 12 on the bar and supporting said rod, a bracket adjustably and rotatably mounted on said sleeve, 'means for holding said bracket on said sleeve and'angle bar l0, an index` :l

lever fulcrumed on said bracket and in' en- Q;-

FREDERICK BRINK. Witnesses: f

A BNER W. BARTON, Y CHAs. F. SCHMELZ.` I

i Surface-Indicators," errore appear in theprinted' specification(requiring correction, I'

n is hrebyii'ed han letters Patent No. 928,492, graptdqqlyfiss, upon the applic'atiof'bf Frederick B1-ink, of Hartford,Connecticut, for an im'pirpyelment in as follows;;the^jc1aim,'the reference-numerals.1,`v llqzvvlgrffglbuld be? stricken'out; fand that'the said Letters Patent should be read Awiththese'lco'rr 

